~2 billion warriors killed.[1]
All zerg forces either destroyed or brought under control of the UED fleet

Insignificant

The Invasion of Char was an assault launched by the United Earth Directorate to conqueer the new zerg Overmind's Swarm by invading the zerg primary hiveworld of Char and taking control over the creature with powerful drugs. After a heated battle, the UED's attempt was a success.

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As their forces were approaching Char, the UED fleet noticed that the Daggoth's Renegade Swarm was in disarray, thanks to the effects of the Psi Disrupter, which disrupted zerg communications. There were so many zerg on Char that, if the Psi Disrupter had not been activated, there would have been no hope of victory.

Three cerebrates were able to resist the effects of the Psi Disrupter enough to keep their Broods functional. The UED's plan was to carve a path through the zerg to the second Overmind, then have their scientists inject it with powerful drugs to pacify it.

Unfortunately, they immediately ran into a problem. Each of the cerebrates had a special ability. The first could inject its sunken colonies with energy, keeping them effectively invincible, the other cerebrate will reincarnate the Torrasque,while the other one did not immediately reveal their powers.

The terrans heard a very loud tortured roar ... it sounded like an ultralisk, but this was no ordinary ultralisk. It was the Torrasque. This powerful version of the ultralisk charged into the UED's current territory. A marine reported the situation to the UED Captain as though it were a meal, "Sir, we've just had a whole cargo-ship full of whoop-ass dumped on us! We ran into a new strain of ultralisk and it took a lot o' pepper to bring it down. To top it all off, our recon squad reports that the critter's been reincarnated by a nearby cerebrate and is on its way back for more!"

This cerebrate, surrounded by multiple ultralisk caverns, could reincarnate the Torrasque repeatedly.

However, the disarray in the zerg forces created vulnerabilities in the defense. The UED was able to carve a path to all cerebrates and kill them, rendering all the zerg defending the Overmind docile. The cerebrates did not reincarnate (at least not immediately).

After that, several medics moved up to the Overmind and injected it with powerful neurostims that would render it docile and vulnerable to the effects of psionics. As the UED set about putting the Overmind under the control of its psychics, they received unwanted visitors, Sarah Kerrigan and Samir Duran.

Duran introduced Kerrigan, who informed DuGalle that she had made alliances with peopleopposed to the UED's presence in the sector. DuGalle told her his Psi Disrupter could defeat her, but Kerrigan responded that it wouldn't last forever. She also said that Stukov was twice the man that DuGalle ever was, and that she was glad he saved her the trouble of killing him. Then she and Duran made a hasty retreat.[2]